Patterson-UTI Energy, Inc. engages in the provision of drilling and pressure pumping services, directional drilling, rental equipment and technology. It operates through the following segments: Contract Drilling Services, Pressure Pumping Services, and Directional Drilling Services. The Contract Drilling Services segment markets its services to major and independent oil and natural gas operators. The Pressure Pumping Services segment provides pressure pumping services to oil and natural gas operators primarily in Texas and the Appalachian Basin. The Directional Drilling Services segment offers downhole performance motors and equipment to provide services including directional drilling, downhole performance motors, motor rentals, directional surveying, measurement-while-drilling, and wireline steering tools, in most major onshore oil and natural gas basins. The company was founded by Cloyce A. Talbott and A. Glenn Patterson in 1978 and is headquartered in Houston, TX.